Patent GB-190608455-A (GB)
Title: Improvements in Lace and in the Method of Making the same
Inventor: BIRKIN THOMAS STANLEY
Filed: 1906-04-09
Granted: 1906-11-15
Abstract: 8455. Birkin, T. S. April 9. Lace-making.-Relates to the production, in the same curtain, of two, three, and four gait Swiss effects, two-gait double-tie effects, double-nip combination work, open-work, two-gait clothing, and a four - gait thickened patterning combined of Swiss and clothing effects. The machine is provided with three or more full-threaded guide-bars a, b, c, the front bar c carrying the warp threads f while the bars b, a carry fine and thick spool threads e, d, respectively. Each jack m is connected to a single-lift jacquard o' and to one or more double-lift jacquards p<1>, and can be held clear of all the threads as shown, or in the positions s, t, as indicated by dotted lines, to engage, respectively, the spool threads or all the threads. The method of working is as follows :-Starting with the carriages in the back combs, the back and front bars a, c fall two gaits, and the centre bar b three gaits. The two jacquards lift together and the unselected jacks then enter, after which the centre bar falls one gait and the front bar c rises one gait. The single-lift jacquard then lowers its needles, whereupon the jacks that have been held clear of the threads by this jacquard move to or remain in the position controlled or selected by the double-lift jacquard. The back bar a then falls two gaits and the carriages pass to the front. In the back half-motion the back bar a rises three gaits and the bars b, c two gaits. The jacks are then selected by the two jacquards in conjunction, as in the front motion, and the back bar a rises one gait, while the front bar c falls one gait. The single-lift jacquard then lowers its needles, leaving the jacks under control of the double - lift jacquard, and the centre bar b rises two gaits. The carriages then return to the back combs. Two-gait Swiss effects D are made from the spool threads e by allowing the jacks to enter to the position s after the second movement of the guide-bars on the front motion and after the first movement of the bars on the back motion. Twogait double-tie effects B are obtained from the spool threads by causing the jacks to enter to the position s after the second movement of the guide-bars on both motions. Double-nip combination work is made by the jacks entering through all the threads to the position t after the first movement of the guide-bars on both motions, the threads of adjacent pillars being thus caused to combine. Open-work is obtained when the threads are wrapped round their own bobbin thread, by causing the jacks to take up the position s after the first movement of the bars on both motions of the machine. Two-gait clothing C is made from the spool threads d, the jacks entering to the position s after the first movement of the bars on the front motion and after the second movement of the bars on the back motion. The thickened clothing effects A, Fig. 2, are four-gait clothing effects from the threads d co-operating with fourgait Swiss effects from the threads e. The jacks are held clear of the threads on both motions.